Common use of Tree Pruning Clause in Contracts

Tree Pruning. The Contractor shall meet with the City Representative to determine the objectives below. a. Structural Pruning is the removal of branches and stems to influence the orientation, spacing, growth rate, strength of attachment, and ultimate size of branches and stems. Structural pruning is used on young and medium-aged trees to encourage a sustainable trunk and branch arrangement. b. Crown Pruning or “cleaning out” is the removal of dead, diseased, crowded, weakly attached and low-vigor branches and water sprouts from the entirety of the tree crown. This type of pruning is done to reduce the risk of branches falling from the tree and to reduce the movement of decay, insects, and diseases from dead or dying branches into the rest of the tree. Cleaning is the preferred pruning type for mature trees. c. Crown Reduction is used to reduce the height and/or spread of a tree. Reduction is the selective removal of branches and stems to decrease the height and/or spread of a tree or shrub. This type of pruning is done to minimize the risk of failure, to reduce height or spread, for signal or street-light clearance, to clear vegetation from buildings or other structures, or to improve the appearance of the tree. d. Crown Restoration is corrective pruning used to restore the form of crowns that have been previously damaged by extenuating circumstances. Restoration is the selective removal of branches, sprouts, and stubs from trees that have been lion tailed, broken in a storm, or otherwise damaged. The goal of restoration is to improve a tree structure, form, or appearance. e. Crown Raising is the removal of lower branches of a tree to provide clearance for signage, buildings, vehicles and pedestrians. It is important that a tree have at least one-half of its foliage on branches that originate in the lower two-thirds of its crown to ensure a well-formed, tapered structure and to uniformly distribute stress within the tree. f. Palm Pruning consists of maintaining the crowns and trunks of palm trees including the pruning of dead or declining fronds, seed pods and the skinning or shaping of spent petiole bases into a ball or nut as applicable by palm type. The Contractor will not use climbing spikes to prune palms. Contractor will be responsible for removing any remaining “hanging” fronds after pruning activities have ceased.

Tree Pruning. The Contractor shall meet with the City Representative to determine the objectives below. All tree care will be conducted per American National Standards Institute (ANSI) Standards and supervised by a Certified Arborist International Society of Arboriculture (ISA). No more than fifteen (15%) percent of live wood or foliage may be removed from the crown of any tree. All pruning cuts are to be made in such a manner as to favor wound closure by natural callus growth and special care is to be taken to leave the branch collar intact. Pruning shall be paid at the unit price for a tree measured at Diameter Breast Height (DBH). No pruning shall be made on trees over fifteen (15) inches DBH. The Contractor shall confirm the type of pruning requested on a City issued work order before proceeding with work. All tree care will be conducted per ANSI standards, A300 and Z133 and supervised by an ISA Certified Arborist. a. Structural Pruning is the removal of branches and stems to influence the orientation, spacing, growth rate, strength of attachment, and ultimate size of branches and stems. Structural pruning is used on young and medium-aged trees to encourage a sustainable trunk and branch arrangement. b. Crown Pruning or “cleaning out” “cleaning out” is the removal of dead, diseased, crowded, weakly attached and low-vigor branches and water sprouts from the entirety of the tree crown. This type of pruning is done to reduce the risk of branches falling from the tree and to reduce the movement of decay, insects, and diseases from dead or dying branches into the rest of the tree. Cleaning is the preferred pruning type for mature trees. c. Crown Reduction is used to reduce the height and/or spread of a tree. Reduction is the selective removal of branches and stems to decrease the height and/or spread of a tree or shrub. This type of pruning is done to minimize the risk of failure, to reduce height or spread, for signal or street-light clearance, to clear vegetation from buildings or other structures, or to improve the appearance of the tree. d. Crown Restoration is corrective pruning used to restore the form of crowns that have been previously damaged by extenuating circumstances. Restoration is the selective removal of branches, sprouts, and stubs from trees that have been lion tailed, broken in a storm, or otherwise damaged. The goal of restoration is to improve a tree structure, form, or appearance. e. Crown Raising is the removal of lower branches of a tree to provide clearance for signage, buildings, vehicles and pedestrians. It is important that a tree have at least one-half of its foliage on branches that originate in the lower two-thirds of its crown to ensure a well-formed, tapered structure and to uniformly distribute stress within the tree. f. Palm Pruning consists of maintaining the crowns and trunks of palm trees including the pruning of dead or declining fronds, seed pods and the skinning or shaping of spent petiole bases into a ball or nut as applicable by palm type. The Contractor will not use climbing spikes to prune palms. Contractor will be responsible for removing any remaining “hanging” fronds after pruning activities have ceased.